Package include: 1 x LED water temperature gauge 1 x waterproof seal 1 x manual[HIGH-PRECISION] – Highly sensitive built-in thermometer that measures the temperature of the water flow in 0.5 seconds. Measuring range: 5℃-85℃, temperature accuracy: ± 0.5 ℃.[ELEGANT DESIGN AND WATERPROOF LED DISPLAY] – High quality bathroom thermometer even applies to most bathrooms. Even in the dark, the 360 degree rotatable waterproof LED display can be seen well.[NO BATTERY REQUIRED] – the most important feature is the use of technology that generates electricity through water flow. No batteries are required. Built-in water flow generators can generate electricity as long as water flows through them.[EASY TO INSTALL] – Connects to standard 1/2 “tubing and meets most home and hotel standards. Built-in waterproof gasket, hand tight, ready to use, easy to install and remove, easy to carry, most sizes can be completed in minutes of installation[SMART HOME AND BABY BATH ESSENTIALS] – Bathe the thermometer in real time and use the latest innovations to upgrade and update your bathroom. This is the essential home appliance for modern smart homes, especially for families with toddlers or babies.